Compact heat exchanger



FIG. 1 is a perspective view of a compact heat exchanger, showing my newdesign;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a top plan view thereof.

The ornamental design for a compact heat exchanger, as shown anddescribed.